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Author : Anonim
Publisher : Unknown
Page : 68 pages
File Size : 55,7 Mb
Release : 1978
Category : Aquatic ecology
ISBN : UCR:31210024936005
Author : Fuad M. Teeny,Alice S. Hall
Publisher : Unknown
Page : 38 pages
File Size : 46,7 Mb
Release : 1977
Category : Chromium
ISBN : UOM:39015095120559
Author : Henry E. Tatem,Jeffrey H. Johnson
Publisher : Unknown
Page : 77 pages
File Size : 52,6 Mb
Release : 1978
Category : Aquatic ecology
ISBN : OCLC:227506451
A multidisciplinary approach was utilized to study the physical, chemical, and biological effects of disposal of contaminated dredged material from the Duwamish River on a deepwater disposal site located in Elliott Bay, Puget Sound, Wash. A pilot survey, conducted in November and December 1975, was followed by a full-scale field assessment program. Observation of individual disposal events indicated that the sediment left the split-hull barges as a well-defined slug and reached the bottom in approximately 25 sec. A mound of dredged material 2.2 m high was created near the center of the disposal site. There was no physical of chemical evidence which indicated that any of the material reached the two reference sites located east and west of the disposal site. Chemical analyses of the in situ river sediment revealed concentrations of total sulfides and PCB's and interstitial water ammonia significantly higher than those for sediments from the disposal or reference sites. Chemical analyses of animal tissues collected at the disposal and reference sites indicated that the disposal operation did not result in higher levels of mercury and chromium in test animals. Mussels held at the disposal site for 3 weeks did accumulate PCB's to some extent; however, background levels of PCB's in Elliott Bay waters were found to be relatively high before the operation. No adverse effects on demersal fish or shellfish were demonstrated.
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 41,6 Mb
Release : 1978
Category : Electronic
ISBN : OCLC:227505834
A cooperative research program, sponsored by the Office, Chief of Engineers, U.S. Army, was conducted in Elliott Bay near Seattle, Wash., to determine the effects of disposal of dredged material from the Duwamish Waterway in open water. The study involved several agencies, both public and private, investigating various aspects of the disposal operation. The research described in this report was conducted by the National Marine Fisheries Service of the National Oceanic and Atmospheric Administration to determine the effects of dredged material disposal on demersal fish and shellfish at the disposal site. It was concluded that the quantity of dredged material dumped during the study did not have a lasting detrimental effect on the demersal fish and shellfish populations at the disposal site. The investigators recommend (a) that any future study include a longer period of time for collecting baseline data, (b) that the characteristics of the reference sites be more comparable to those of the disposal site, and (c) that the disposal operations be conducted in a manner similar to that which is used in actual practice so the results might have general application.
Author : D. J. Baumgartner,J. B. Carkin,D. W. Schults
Publisher : Unknown
Page : 65 pages
File Size : 49,7 Mb
Release : 1978
Category : Aquatic ecology
ISBN : OCLC:4165344
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 54,7 Mb
Release : 1978
Category : Electronic
ISBN : OCLC:227505834
A cooperative research program, sponsored by the Office, Chief of Engineers, U.S. Army, was conducted in Elliott Bay near Seattle, Wash., to determine the effects of disposal of dredged material from the Duwamish Waterway in open water. The study involved several agencies, both public and private, investigating various aspects of the disposal operation. The research described in this report was conducted by the National Marine Fisheries Service of the National Oceanic and Atmospheric Administration to determine the effects of dredged material disposal on demersal fish and shellfish at the disposal site. It was concluded that the quantity of dredged material dumped during the study did not have a lasting detrimental effect on the demersal fish and shellfish populations at the disposal site. The investigators recommend (a) that any future study include a longer period of time for collecting baseline data, (b) that the characteristics of the reference sites be more comparable to those of the disposal site, and (c) that the disposal operations be conducted in a manner similar to that which is used in actual practice so the results might have general application.
Author : Susan Frances Sugai,William R. Schell,A. Nevissi,S. Olsen,D. Huntamer
Publisher : Unknown
Page : 70 pages
File Size : 46,5 Mb
Release : 1978
Category : Aquatic ecology
ISBN : UOM:39015095120401
Author : C. Rex Bingham
Publisher : Unknown
Page : 116 pages
File Size : 42,7 Mb
Release : 1978
Category : Aquatic ecology
ISBN : UOM:39015095120690
Author : Spyros P. Pavlou
Publisher : Unknown
Page : 96 pages
File Size : 42,6 Mb
Release : 1978
Category : Polychlorinated biphenyls
ISBN : OCLC:227517379
This report presents a detailed discussion of the results obtained in a study conducted to evaluate the release of polychlorinated biphenyls (PCB's) during open-water disposal of contaminated dredged material in Elliott Bay, Puget Sound, Washington. Appendices A'-E' to this volume present the raw data tables, descriptions of materials and techniques, along with the computer program used for PCB data reduction and a sample input and output. The appendices were reproduced in microfiche and are enclosed in an envelope attached inside the back cover of this report.
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 49,6 Mb
Release : 1978
Category : Electronic
ISBN : OCLC:227508197
Benthic community changes resulting from the open-water disposal of 114,350 cum of Duwamish River dredged material at the Elliott Bay, Puget Sound, deep-water (approximately 60 m) experimental disposal site, 7 February 1976 to 6 March 1976, were investigated. Analyses were performed on macrofaunal density, species composition, biomass, biomass/individual, frequency of occurrence, and species diversity, at several taxonomic levels for one predisposal sampling and five postdisposal samplings at 10 days, and 1, 3, 6 and 9 months after disposal. These analyses were performed on data from stratified (central, side, and corner) disposal site stations and two (east and west) reference sites. Taxonomic levels investigated were total benthic macrofauna, macrofaunal groups (gastropods, pelecypods, errantian worms, sedentarian worms, and miscellaneous species), and individual species. Most individual species showed seasonal trends (both graphically and statistically) at the reference sites and the corner disposal site stations, indicating that rate of benthic macrofaunal recovery from dredged material disposal may be affected by seasonal parameters. Therefore, timing of dredged material disposal on similar sites may be important in reducing the severity of impact on the benthic macrofauna.
Author : Virginia Falk Stout,Laura G. Lewis
Publisher : Unknown
Page : 0 pages
File Size : 41,7 Mb
Release : 1977
Category : Marine animals
ISBN : OCLC:1398334643
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 54,8 Mb
Release : 1977
Category : Electronic
ISBN : OCLC:227497197
This report describes studies concerning the possible transfer to marine animals of polychlorinated biphenyls (PCB's) as a result of the open-water disposal of PCB-laden dredged material. Dredged material from the Duwamish River in Seattle, Washington, was deposited at an experimental site in nearby Elliott Bay. The PCB content of indigenous animals, English sole (Parophrys vetulus) and Alaska and Oregon pink shrimp (Pandalus borealis and P. jordani), and animals caged at the site, spot shrimp (P. platyceros), sea cucumber (Parastichopus californicus), and mussel (Mytilus edulis) was determined. It was not possible to ascertain whether or not marine animals concentrate PCB's as the result of deposition of PCB-laden dredged material. The small increase in PCB level observed in mussels may have been related to the flux of PCB's resulting from the disposal operation. Alternatively, it may have issued from the PCB burden normally carried downstream by the Duwamish River. These data indicate that no obvious changes have occurred in the PCB levels in marine animals in Elliott Bay as the result of depositing PCB-laden dredged material at the experimental site. (Author).
Author : Anonim
Publisher : Unknown
Page : 330 pages
File Size : 46,9 Mb
Release : 1982
Category : Electronic
ISBN : NWU:35556031016967
Author : Anonim
Publisher : Unknown
Page : 720 pages
File Size : 50,5 Mb
Release : 1985
Category : Electronic
ISBN : NWU:35556030177125
Author : Anonim
Publisher : Unknown
Page : 192 pages
File Size : 46,5 Mb
Release : 1975
Category : Electronic
ISBN : NWU:35556031027477